Ghost ship event loot

Did 1415 Ghost ship as a group on my 1445 bard. Did the whole event and got 5 bound Solar Blessings as a reward. What is loot distribution in events based on? Is it scaled based on perceived participation? Is participation based on damage dealt to the target?

Is this a bug or just how the system operates?

Same, happened to me today. Ghost ship 1415 on my pally, only got the 5 solar blessing. No green/purple juicers, no crystals. Last field boss (Tuesday?), the only loot I got was a single relic stone. Its not the first time its happening, on top of that the chaos dungeon boss that sometimes drop nothing, been like that since launch. But the ghost ship being a weekly activity its extra shitty ngl.